反应耦合法制备苯氨基甲酸甲酯产物分离过程的模拟  

Separation Simulation of Product Methyl N-Phenyl Carbamate Obtained Through Coupled Reaction

作　　者：沈鹏飞[1,2] 李会泉[2] 王瑶[1] 柳海涛[2] 

机构地区：[1]大连理工大学化工学院,辽宁大连116012 [2]中国科学院过程工程研究所绿色过程工程院重点实验室,北京100190

出　　处：《石油化工》2010年第6期651-655,共5页Petrochemical Technology

基　　金：国家科技支撑计划重大项目课题(2006BAC02A08);中国科学院知识创新工程课题(KGCX2-YW-215-2)

摘　　要：对碳酸二甲酯(DMC)和二苯基脲反应耦合法合成苯氨基甲酸甲酯(MPC)的产物进行分离研究;测定了MPC的热重数据以及MPC-DMC物系的汽液平衡数据;在考虑了各组分分离特性的基础上,确定了单塔减压侧线采出工艺;采用AspenPlus过程模拟软件对分离工艺进行了模拟计算。优化的操作条件为:理论塔板数为12块,进料位置为第8块塔板,侧线采出位置为第4块塔板,塔顶采出量为535.3kg/h,侧线采出量为16.0kg/h,塔釜绝对压力为98.94kPa,回流比为0.12。在此条件下,分离得到的塔顶产品中xDMC=99.6%,DMC的收率大于99.0%;塔釜产品中xMPC=98.7%,MPC的收率大于99.0%。Separation process for synthesis of methyl N-phenyl carbamate （MPC） from dimethyl carbonate （DMC） and N, N＇-diphenylurea through coupled reaction without phosgene was studied. Both TG-DTG curves of MPC and vapor-liquid equilibrium data of the MPC-DMC system were determined. According to the properties of the components, the separation route of single vacuum column with siding was designed. Optimum parameters calculated by Aspen Plus software were as follows： number of theoretical plates 12, feed input position at the 8th plate, siding position at the 4th plate, distillate rate 535.5 kg/h, flow rate of side stream 16.0 kg/h, absolute pressure at bottom 98.94 kPa and reflux ratio 0. 12. The separation results were mole fraction of DMC at overhead 99.7%, the recovery rate of DMC more than 99.0%, mole fraction of MPC at bottom 98.7% and the recovery rate of MPC more than 99.0%.

关 键 词：碳酸二甲酯 苯氨基甲酸甲酯 二苯基脲 反应耦合法 分离 蒸馏 模拟 

分 类 号：TQ028[化学工程]